VariableTraditionalMm.c File Reference

#include <Library/UefiBootServicesTableLib.h>
#include <Library/SmmMemLib.h>
#include "Variable.h"

Go to the source code of this file.

Functions
BOOLEAN	VariableSmmIsPrimaryBufferValid (IN EFI_PHYSICAL_ADDRESS Buffer, IN UINT64 Length)
BOOLEAN	VariableSmmIsNonPrimaryBufferValid (IN EFI_PHYSICAL_ADDRESS Buffer, IN UINT64 Length)
VOID	VariableNotifySmmReady (VOID)
VOID	VariableNotifySmmWriteReady (VOID)
EFI_STATUS EFIAPI	VariableServiceInitialize (IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable)
BOOLEAN	VariableIsMorVariableLegitimate (VOID)

Detailed Description

Parts of the SMM/MM implementation that are specific to traditional MM

Copyright (c) 2011 - 2024, Intel Corporation. All rights reserved.
Copyright (c) 2018, Linaro, Ltd. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file VariableTraditionalMm.c.

Function Documentation

VariableIsMorVariableLegitimate()

BOOLEAN VariableIsMorVariableLegitimate

(

VOID

)

Whether the TCG or TCG2 protocols are installed in the UEFI protocol database. This information is used by the MorLock code to infer whether an existing MOR variable is legitimate or not.

Return values

TRUE	Either the TCG or TCG2 protocol is installed in the UEFI protocol database. MOR variable is legitimate.
FALSE	Neither the TCG nor the TCG2 protocol is installed in the UEFI protocol database. MOR variable is not legitimate.

Definition at line 126 of file VariableTraditionalMm.c.

VariableNotifySmmReady()

VOID VariableNotifySmmReady

(

VOID

)

Notify the system that the SMM variable driver is ready.

Definition at line 58 of file VariableTraditionalMm.c.

VariableNotifySmmWriteReady()

VOID VariableNotifySmmWriteReady

(

VOID

)

Notify the system that the SMM variable write driver is ready.

Definition at line 79 of file VariableTraditionalMm.c.

VariableServiceInitialize()

EFI_STATUS EFIAPI VariableServiceInitialize	(	IN EFI_HANDLE	ImageHandle,
		IN EFI_SYSTEM_TABLE *	SystemTable
	)

Variable service MM driver entry point

Parameters

[in]	ImageHandle	A handle for the image that is initializing this driver
[in]	SystemTable	A pointer to the EFI system table

Return values

EFI_SUCCESS

Variable service successfully initialized.

Definition at line 107 of file VariableTraditionalMm.c.

VariableSmmIsNonPrimaryBufferValid()

BOOLEAN VariableSmmIsNonPrimaryBufferValid	(	IN EFI_PHYSICAL_ADDRESS	Buffer,
		IN UINT64	Length
	)

This function checks if the buffer is valid per processor architecture and does not overlap with SMRAM.

Parameters

Buffer	The buffer start address to be checked.
Length	The buffer length to be checked.

Return values

TRUE	This buffer is valid per processor architecture and does not overlap with SMRAM.
FALSE	This buffer is not valid per processor architecture or overlaps with SMRAM.

Definition at line 46 of file VariableTraditionalMm.c.

VariableSmmIsPrimaryBufferValid()

BOOLEAN VariableSmmIsPrimaryBufferValid	(	IN EFI_PHYSICAL_ADDRESS	Buffer,
		IN UINT64	Length
	)

This function checks if the Primary Buffer (CommBuffer) is valid.

Parameters

Buffer	The buffer start address to be checked.
Length	The buffer length to be checked.

Return values

TRUE	This buffer is valid.
FALSE	This buffer is not valid.

Definition at line 25 of file VariableTraditionalMm.c.